Content rich sites can earn additional income, instead of or in addition to the use of traditional affiliate banners -- by using Google AdSense. Adsense serves up contextually targeted text and image ads that are targeted to particular pages of your site. They are designed to give ongoing, appropriate product purchase opportunities to your site visitors, with a minimum of effort by the site publisher. Once approved for the program, the site publisher places one link per site page, and is served up to three ads when pages are opened.

Google creates the relationships with the advertisers and only delivers the most appropriate ones to your web pages. Based upon keywords, a real time auction takes place as a visitor opens a page on your website. Based upon bids placed by advertisers, Google AdSense places relevant cost-per-click (CPC) and cost-per